What are the uses of laravel+redis

The useful methods of laravel redis are: 1. Use Redis as a cache driver; 2. Use the cache operation method provided by Laravel to operate the Redis cache; 3. Use Redis as a data storage system. Laravel provides a way to interact with Redis. Methods enable us to store and read data conveniently; 4. It also provides other advanced functions, such as publish and subscribe, transactions and pipelines, etc. Laravel also provides corresponding methods to operate these functions.

The operating environment of this article: Windows 10 system, Laravel9.x version, Dell G3 computer.

Laravel is a popular PHP framework, and Redis is an open source in-memory data structure storage system. The combination of Laravel and Redis can provide more efficient caching and data storage capabilities for web applications. I will introduce the usage of Laravel and Redis in detail.

Install the Redis extension in the Laravel project. You can install the Redis extension through Composer. Just add the predis/predis dependency to the composer.json file in the project root directory, and then run the composer update command to install it.

After the installation is complete, we need to configure the Redis connection in the configuration file of the Laravel project. Open the config/database.php file, find the redis array, and set its configuration items as follows:

'redis' => [
    'client' => 'predis',
    'default' => [
        'host' => env('REDIS_HOST', '127.0.0.1'),
        'password' => env('REDIS_PASSWORD', null),
        'port' => env('REDIS_PORT', 6379),
        'database' => env('REDIS_DB', 0),
    ],
],

Here we use the .env file to configure the Redis connection information, which can be added in the .env file The following configuration:

REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379
REDIS_DB=0

After the configuration is completed, we can use Redis in the Laravel project.

1. Use Redis as the cache driver.

Open the config/cache.php file, set the value of the 'default' option to 'redis', and then configure the 'redis' option of the 'stores' array as follows:

'redis' => [
    'driver' => 'redis',
    'connection' => 'default',
],

This sets Redis as Laravel's default cache driver.

2. You can use the cache operation method provided by Laravel to operate the Redis cache.

For example, we can use the cache() global helper function to obtain and store cache data. The following are some common cache operation examples:

// 获取缓存数据
$value = cache()->get('key');
// 存储缓存数据
cache()->put('key', $value, $minutes);
// 判断缓存是否存在
if (cache()->has('key')) {
    // 缓存存在
} else {
    // 缓存不存在
}
// 删除缓存
cache()->forget('key');
除了使用全局辅助函数，我们还可以使用Cache门面类来进行缓存操作。以下是使用Cache门面类的示例：
use Illuminate\Support\Facades\Cache;
// 获取缓存数据
$value = Cache::get('key');
// 存储缓存数据
Cache::put('key', $value, $minutes);
// 判断缓存是否存在
if (Cache::has('key')) {
    // 缓存存在
} else {
    // 缓存不存在
}
// 删除缓存
Cache::forget('key');

3. Use Redis as the data storage system.

Laravel provides methods to interact with Redis, allowing us to easily store and read data.

First, we need to introduce the Illuminate\Support\Facades\Redis facade class into the class that needs to use Redis. Then, you can use the methods of the Redis facade class to manipulate Redis data.

The following are some commonly used Redis data operation examples:

use Illuminate\Support\Facades\Redis;
// 存储数据
Redis::set('key', 'value');
// 获取数据
$value = Redis::get('key');
// 判断数据是否存在
if (Redis::exists('key')) {
    // 数据存在
} else {
    // 数据不存在
}
// 删除数据
Redis::del('key');

4. Redis also provides other advanced functions, such as publish and subscribe, transactions and pipelines. Laravel also provides corresponding methods to operate these functions.

For example, we can use the publish method of the Redis facade class to publish messages and the subscribe method to subscribe to messages. The following is an example of publish and subscribe:

use Illuminate\Support\Facades\Redis;
// 发布消息
Redis::publish('channel', 'message');
// 订阅消息
Redis::subscribe(['channel'], function ($message) {
    // 处理接收到的消息
});

Summary

The combination of Laravel and Redis can provide more efficient caching and data storage capabilities for web applications. By configuring the Redis connection and using the cache operation method provided by Laravel, we can easily use Redis as the cache driver and perform cache operations. At the same time, by introducing the Illuminate\Support\Facades\Redis facade class, we can also use Redis data operation methods and advanced functions. I hope this article will help you understand the usage of Laravel and Redis.

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